Mold for building blocks and the like



Jan. 26 1926. 1,570,998

E. v. EGGER 'now Fon BUILDING Locxs AND Tus LIKE Filed oct. 12, 1925 u Patented Jan. 26, 1926.

UNITED STATES EVERETT V. EGGER, OF ELGIN, ILLINOIS.

MOLD FOR BUILDING BLOCKS AND THE LIKE. i

Application filed October 12, 1925. Serial No. 61,881.

TQ aZZ whom. t may concern.: g

Be it known that I, Evnnn'rr lV,- EG'GER, a 'citiien of the United States, residing at Elgin, in the county of Kane and State of Illinois, ave invented a certain new and useful iin'provement in Mold 'for Building Blocks and the like, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, 'forming a part of this speciiication.

This invention relates to molds for building blocks and the like, more particularly to molds for blocks comprising a plurality of parts with connecting and re-enforcingI elements between them, and its objects are the provision ot a generally improved and simplified mold in which lthe blocks may be expeditiously and economically 'formed and a mold into which the introduction of the concrete or other material is facilitated as is the removal 'of the molded block therefrom.

To acquaint thoseskilled in the art with the construction and manner of practicing the invention. I shall now describe certain embodiments of the same in connection with the accompanying drawings, in whichw Fig. is an isometric view of an embodiinent 'of the invention showing the blocks therein partially broken away to reveal the core and the disposition of the connecting 'and r'e-enforcing elements; Fig. 2 is a transverse section taken on the lin e 2-2 of Fig. l;

Fig. 3 is a perspective view of one of the blocks formed in the mold of Figs. 1 and 2;

Fig. 4 is a transverse section through an embodiment of the invention for forming angular blocks; and Fig. 5 is a modification of the embodiment shown in Fig. 4.

The mold shown in Figs. l and 2 has a bottom or base 5 provided with removable longitudinally extending side walls 6 and with transverse end walls 8. The end walls 8 may be mounted edgewise upon the bottom 5 and between the ends' oi the side walls 6 with the bottom 5 fitting between the lower edges of the side wallsl6. Clamping members designated more or less diagrammati- -cally at 10 may be employed for holding the walls in position to torni a case Jtor shaping the concrete blocks therein.

The resulting block is shown in Fig. 3 and consists of two parts or generally parallel :sides or sections A1.2--1529 separated by an air space 16 and held together by a plurality of connecting and reenforcing elements shown in the form of iron tie or bonding rods 14. These rods 14 may be made up of quarter inch square twisted stock with their opposite ends turned at 15 and anchored in the two parts 12-12 of the block.

As illustrative of the relative dimensions of a commercially practical block, its length, which is the transverse dimension yor width ot' the mold, may be about 15 or 16 inches, its width about 7 5/8 inches, the air gap about 3 inches and' the thicknesses of the two parts about 21/2 inches apiece.

The mold which is broken away within its length and therefore incomplete as to length, in Fig. l, may be for any desired number of these blocks, for example eight, in which the internal dimension of its length would be about eight times the width of the individual block, plus the thicknesses of the separating plates or partitions 20. The plates or partitions 20, which may be of steel, separate the individual blocks and keep them separate in the molding process. These plates are set in notches 22formed in the side walls 6, as shown in Figs. 1 and 2.

The air space 13 is formed by a core 25 and the notches 22 extend above and below the core, there being plates 2O below the core for separating the bottom parts of the blocks and separate plates above the core for separating the top parts of the blocks, so that there are two plates 20 in each pair of notches22 and these two plates are separated by the core 25.

The core 25 comprises two planks or core members 26-26 which .extend endwisc through themold between the connecting and re-en'forcing rods 14. Extending along the outer edge of each of the planks 26 are two additional planks 28--28 which complete the horizontal support for the upper -vlayer or part of the block. The planks 28--28 7.100

I blocks.

the blocks are a pair of transverse wedge boards or planks 50. When the case is closed, as shown, these may t between the sides thereof, or where the case is of open formation, they may project therefrom. One of the boards or planks 50l may be disposed, for example, transversely on each end of the mold. The combined thicknesses of these planks 50 and the core boards or planks 26 and 28 is equal tO the distance between the two parts otl the block and the core boards 26 and 28 are laid longitudinally across the members 50, which, when the side walls of the mold are laid off, may be conveniently driven out or. removed, andwhen removed free the core boards 26 and 28 for convenient removal in themanner described.

In use, after the case'comprisingthe bot tom, sides 6` and ends8, Yhasbeen set up and locked or clamped in position, the lower separating plates 20 aretirstputi into position in thelower `part vof the mold and the concrete or other material is poured to the desired depth at the bottom ot the mold. The members 50 are then laid transversely across the upper surface ot the bottom layer or part, whereupon the core planks28 are laid in place longitudinally thereacross, as shown in Fig. 2, and the rods 14-positioned in the notches 30 with their lower ends suitably anchored in the bottom parts ot the The central planks 2G are then put in between the side .planks 28 and longitudinally across the members 50 and then with the upper separating plates 20 in place, the concrete or other material is poured into the top of the mold to form the top parts of the blocks, the upper ends of the ro'ds 14 projecting into the upper-parts Ot the blocks and being firmly anchored therein when the concrete sets. When the` blocks have sutliciently set or hardened,.the mold may 'be taken apart. by unclamping. the end walls 8 and sidewalls 6. The side walls may then be laid off sidewise. IVith the sidewalls laid 0E, the members 50 which are-in the form of relatively7 narrowy strips. having little surface engagement withthe concrete are thenreinoved, .whereupon the side pieces 28 are pulled A'out sidewise andthe .planks or central coreV pieces 26 arefpulled out endwise. v 'Ifhe dispositioirofthenotchesBO for accommodating the .jrodsl 14. enti-relyv in the side piecesr28 avoids any-interlocking engagement offthe. piecesf26 with-th'ef-rods 14 and thereby permit'stheendwise withdrawal ot said pieces, 26. yThe interlocking engagement of" the pieces 28fwiththe rods 14 is in the direction of withdrawal of said side lpieces 28 so as, to Vnot interfere therewith, and when the side pieces tiarelaid oli', the sidewise withdrawal of the pieces 28 is a simple matter. y

The embodiment` shown in Fig. 4 is for 'forming anangular block-sueltas commonly employed in laying a corner. In this case the mold case may be substantially as bei'ore, but the core comprises three core pieces 30, 8l and 32. rIhe bottom plates 20 are preferably angular to lay along the bottom between the bottom ot the case and the pieces 30Y and 3l and up along one side between the side wall ot the case and the core piece 32 and end of the core piece 80. 'Ihe core pieces 30 and 3l, instead of extending entirely through the mold, terminate short of one end thereof to give the angular for! mation to the block, and at this end the core piece 32 is laid or set edgewise upon the core piece 30.

The upper plates 20 may be set in the notches in one of the side walls 6 and in the adjacent side of the core piece 32. The notches 3G for the rods 14 are again entirely in the side piece 3L. and when the side pieces G are laid off, the side piece 3l is removed sidewise while the core pieces 30 and 32 are adapted to be pulled out endwise.

In the modification of Fig. 5 connecting rods 52 are shown between the vertical leg and the upper layer or part ot the block and the core piece 32 is notched along its lower edge at 53 to it over the rods 52. The thickness ot any concrete which might tend to run through the slots 53 is slight, so that any resulting web formation resulting there by may be conveniently chipped oit' or removed.

It" is to be understood that the case may be oi' open formation or ot metal or otherwise, as desired. Screw clamps are contemplate for use where those designated at l0-10 are employed. I also contemplate forming straight and angular blocks in combination in the same-mold case, as by mak ing the molding lprovisions of Fig. 4 at the ends of the case and the molding provisions of Fig. 2 through the intermediate part or between the ends. There angular blocks are formed at theends, the cross pieces 50 may be set back sufficiently so as to not interfere with the pouring of the vertical legs of the blocks.

In the angular inolda longitudinal spacing strip 60 may be employed along the base of the vertical leg of the blockk to assistvin supporting the core boards and to keep the cement from running into the space between them and the lower part of the block upon pouring the vertical leg.

l. In'combination, a mold, a sectionalvcore dividingl said mold, said core comprising an endwise removable part having a continuous edge, and an edgewise removable part extending alongthe side of said first part and having a notched rod receiving edge adjacent the continuous edge of said tirst part.

2. In combination, a mold having bottom, side and end walls, bottom partitions set in,

notches in the side Walls and dividing the mold into separate molding compartments, a sectional core overlying said bottom parti tions and comprising an endwise removable part and a notched rod receiving part eX- tending along said iirst part and removable edgewise, and separating partitions overlying said first partitions and dividing the upper part or the mold into separate molding compartments.

3. A mold core for blocks of the class described comprising a core part adapted for endwise ren'ioval upon completion or the block, and a core part adapted for edgeivise removal, said last core part having notches for receiving connecting and re-entorcing eleinents 'for the blocks, said notches being entirely in said last core part so that said Iirst core part can be endn'ise removed.

L Incombination, a mold having bottom, side and end Walls, bottom partitions set in notches in the side Walls and dividing the ino-ld into separate molding compartments, a sectional core overlying said bottom partitions and comprising a pair of intermediate core parts adapted l'or endwise removal upon completion of the blocks, and a pair o1 core parte having notched edges to receire connecting` and re-eniiorcing element-s tor the blocks, one of said last parts extending along the outer edge ot' each of said irstparts with its notched edge in edgewise abutment therewith, said first core parts being removable endwise and said last parts edgeivise, and separating partitions overlying said first partitions and dividing the upper part of the mold into separate molding compartments.

5. In combination, a. mold, ,a sectional core part comprising an endwise removable part and a notched connecting and 1re-enforcing element receiving parts removable edgevvise, said iirst core parts extending from one side of the mold and terminating at its opposite end short of the opposite side oi the mold, and a second mold' part disposed edgewise upon the free end of said first core part and forming an angular molding space between it and the adjacent Wall of the mold.

6. ln a mold for a two part block, the combination of bottom, side and end Walls, spacers laid upon the bottom block part, and a core laid upon said spacers for supporting the upper core part.

7. In a mold for a two part block, the combination of bottom, side and end Walls, spacers laid upon the bottom block part, and a core laid upon said spacers for supporting the upper core part, said core comprising an endwise removable part and a notched edge- Wise removable part for receiving connecting rods between the parts of the block.

8. In combination, a mold, a sectional core dividing said mold, said core comprising a core part removable endWise in either direction and anotched rod receiving part extending along the side of said iirst part and removable edgewise.

In Witness whereof, I hereunto subscribe my name this 1st day of October, 1925.

EVERETT V. EGGER. 

